[SpeedisaVirus]

That sounds about right for stock. That's just barely over 50% of the rev range. Plenty of rev left. Should be cheaper to change the front sprocket. Doesn't seem worth it unless you plan on doing 100s of miles on the highway regularly.

 

[SpeedisaVirus]

I doubt you will lose top speed. I don't think most SVs can pull to redline in 6th with stock gearing unless you are rolling down a hill.